While that is true for the quality-based things like deli/baker, there is one advantage to massive grocery stores that the stores inside the city can't compete with: selection. Every time I leave the city, I make a point to go to a suburban grocery store and walk down their massive spacious aisles to find new/different products that simply aren't stocked inside the city because shelf space is so limited. Entire aisles dedicated to chips!

Do you consider Red Hook to be suburban? Because the Fairway there is one of the best supermarkets I've ever been inside of in the USA ...